Press



A. A. BYERLEIN sept. 19, `195o PRESS 4 Sheets-Sheet 1 Filed June 11V, 1945 5s 9240 sept. 19, 195o Filed June ll, 1945 A. A. BYRLEIN 2,522,745

PRESS 4 `Sheezcs--Sheec 2 Sept. 19, 1950 v A. A, BYERLEIN 2,522,745

PRESS Filed June 11, 1945 4 sheets-sheet 5 7 2 Ov m 6 8 O7 l 7 082 o f2 e 22 w a q Y n 302 li; "3o,

PM r5.278

Sept 19, 1950 A. A. BYERLEIN 2,522,745

K PRESS Filed June 11, 1945 4 Sheets-Sheet 4.

MN Q. IW 3,8 325 Patented Sept. 19, 1950 v mass Arthur A. Byerliii, Detroit, Mich., assigner, by mesne assignments, to Lima-Hamilton Corpo# ration, Hamilton, Ohio, a crpoation of Vir-J ginia Application .time 11, 1945, serial 598,82'5

rIhis invention relates to presses, and more par-v ticularlyito stamping and drawing presses such' as are used for the forming of metal sheets in" the `manufacture of automobile bodies, sideV rails, andthe like.

Reference is made to my copending application Serial No. 458,686,.1ed September 17, 1942, now Patent No. 2,378,062,1`ssued June 12, 1945, in which is illustrated" and described a press whichl is adapted for stamping or drawing' operations in the forming of parts from metal sheets. Said application also makes reference to problems encountered in the use of large mechanically operating presses for forming automobile body parts, or the like, from thin sheets ofrnetal7 especially when such parts are of considerablesise, such as a so-called quarter panel, and which therefore require presses of very large size. As stated presses such as are used for formingv automobile body parts from such thin metal sheets have been 30 or efeet' or more high in over-all dimen# sions, with beds or 18 feet or even more between uprights and '7` or 8` or more feet deep, The operating mechanisms provided are of such character that they will provide the very" large forces requiredior carrying out the necessary operations, and nevertheless willV maintain the relative movement ofthe parts of the press and the cooperating dies, within" such accuracy that thin metal sheets such as are used in automobile bodies, and which are usually about 1/25 of an inch thick or perhaps slightly thicker, may be" formador drawn to desired intricate shapes, with several sequential forming operations in the same or in different directions,.and` yet avoiding tearing the metal or causingwrinkling such as will form an impracticably'large` percentage of parts having objectionable high lights when" the parts are painted, i; e; with few' faulty parts produced in manufacturing Operations. These presses therefore` must be of such heavy'c'onstruction that they will perform the required operations, or sequence of operations, in` the' stamping or drawing of the metal while'a'cting -upon the metal sheets under pressures cf many hundreds of tons and with the mechanisms never-A theless acting with such precision that only a very small percentage of the iormedparts are so marred in formation' as to be useless because of tearing or. such wrinkling as to require any substantial amount ofV hand finishing, thus` to avoid rejects.` I

In addition such presses may be so constructed as, to be usable` with` suitable dies: and heavy pressures sowas to` form` or draw heavier metal parts, such as the side channel members for Such channel or anglean automobile chassis. bent parts are formed from metal sheets which are much thicker' than the sheets for the body and fenders' etc., as referred to above, and would therefore require either heavier overall pressures or heavier pressures in a more limited forming` die area-i. e. heavier pressures per unit area. That is, informing the channel members it may be' desirable to have a press soccnstructed that the bed may be 30 `feet or more between its supports or up to similar dimensions for die length or between uprights, and narrower than referred toI above-e; g., 4 to 6 feet.

In all such presses the parts themselves are necessarilyv v ery heavy, and must be so :in order towithstand the heavy pressures to which they are subjected in operation and also to support the extremely heavy dies and the weight of the parts themselves. A press such as first referred to above,` such asfor forming automobile body panels,` fenders, etc., and having a bed `15 to 18 feet between uprights, will be so constructed as to provide the great strength and rigidity of parts which is necessary in operation; but despite building the parts and the completed press to have such great strength and to withstand such heavy pressure loads, it is generally recognized that there will be' appreciable sag or deflection of the bed and movable die slide due to the great operating" pressures during the forming'. operation." For varying?` operations the deiiection in some operations'rmay be more or less 'than in others, and the permissible deection of the bed, for example, has been long considered to be up to about .O01 of an inch per foot distance be` tween supports.y For a press bed 15 feet between supportsl the deecion or sag midway between thevbed` ends would be up to about .015 of an inch. And -as the movable die slide tends to deflect inthe oppositeidirection, as it is forced down to effect the` operating pressures on the work between the dies, its deflectionisadded to that of` the bed..` In a railpress,` for example, with the bed some- 3Q feet betweenfsupports the bed deilection would be up to .030 of an inch and also the upper deflection of the movable slide is added to that.-

Qbviously the amount` of deflection of the parts Willvar-y according to theconstruction and weight of thebedmember, the construction and points ofapplication` of Working power to the movable slide, the `shape and` size, etc.- of the dies, the character of the piecesto be formed and the distribution of forces as between the hed and the die slide, and the pressures required for forming the work. While these serious operating difculties have been recognized as present in such presses and it has been the general practice to so construct them that the maximum permissible deection in operation could be held within apredetermined narrow range, having regard to the operations to be performed and the nicety and accuracy of formation required in such operations, nevertheless the effectiveness in press operation has heretofore been circumscribed and the quality of output of a given press, performing varying operations, materially aiect it, as some deflection occurs under the heavy operating pressures despite the greatest care in construction of the press parts andimparting great strength to those parts, as some varying deflection has been found inherent in the operation of these presses and this has led to so constructing the press parts as to give a limited maximum permissible deflection which could be taken into account in the operating of the press. And in practical operations improved expedients such as the use of shims to compensate for extra large or variable deiiections, or where the pressures are abnormally distributed, have been used by press operators in an endeavor to meet the particular conditions confronting them and to effect workable compensations for the particular work being done.

One of the principal objects of the present invention is to provide a mechanically operating stamping or drawing press of the character referred to, which is provided with means whereby sag or deflection may be readily maintained within known and permissible limits and may be automatically compensated for to give more precise and accurate operation, and more certain results in operation.

Another object of the invention is to provide a press with a die carrying member which is pivotally supported so that variations in deflection or deformation as between the two die supporting members may be more readily maintained within practical operating tolerances and compensated for, and deformation of one die carrying member to accommodate itself to deflections or sag in the other may be readily accomplished with improved operating results.

Still another object is to provide a composite die carrying member comprising two parts pivotally interconnected and in which deflection or sag may be readily maintained within a narrow range of operating tolerances and may be readily automatically compensated for with improved operating results.

Another object is to provide such press structure which is compact, requires comparatively low head room, and which may be readily assembled and disassembled and in which a unitary composite die slide and driving mechanism is provided which may be assembled as a unit and placed in the press structure as such.

Other objects and advantages of the invention will be apparent from the description and draw ing and the appended claims.

In the drawing, in which like characters of reference designate like parts throughout:

Fig. 1 is a side elevational view, somewhat diagrammatical, showing a press of such construction with parts broken away and shown in section, along the line l-I of Fig. 2, for more clearly illustrating details of construction;

Fig. 2 is an end elevational View of the construction shown in Fig. 1

Fig. 3 is a top plan view of the press;

Fig. 4 is a side elevation, with parts broken away and in section to show details of construction, of a modified form of press having a composite die slide;

Fig. 5 is a side elevational view of another modied form of press construction, having the driving motor and other parts of the driving mechanism located below the bed;

Fig. 6 is an end elevational view of the construction shown in Fig. 5, with certain parts broken away for simpler and clearer disclosure;

Fig. '7 is a plan view, broken away and shown partly in section along the lines 1--1 of Fig. 5 and laf-1a of Fig. 6; and

Fig. 8 is a bottom view of the front portion of the press illustrated in Figs. 5 to 7 to show details of the driving mechanism.

In the embodiment of the invention illustrated somewhat diagrammatically in Figs. 1 3 of the drawing, the press is shown constructed for forming channel frame members for an automobile chassis, or other long channeled or angled or otherwise bent members out of sheets of metal; and in such construction the distance between uprights is considerably greater than in presses as ordinarily used for forming quarter-panels, fenders and other automobile body parts out of thin sheet steel as above referred to. In the form of construction illustrated the distance between uprights may be thirty or more feet, and the depth of the bed, where comparatively narrow channel members or the like are to be formed, some four to six feet.

The press of this invention has simple and effective means for compensating for tendency towards deiiection or sag in the bed, and the bolster plate and die carried thereby, and also such deflection or sag as may occur in the movable die carrying member so that with the press constructed to keep deflection or deformation of the parts within a permissible tolerance range any deflection may be readily compensated for by the simple and highly effective provisions of this invention. The same is true with respect to the embodiment of the invention illustrated in the two point suspension crank press of Fig. 4, and the modification of Figs. 5-8 in which the composite movable slide member is used but with the form of drive and power applying mechanism in which the motor and mechanism for transmitting power to slide operating linkage is located below the bed instead of on the slide itself as in the construction of Figs. 1-3.

As shown in the embodiment illustrated in Figs. 1-3 the press comprises a bed member 2B which is suitably supported upc-n a concrete door, or other suitable foundation members. As shown the Working floor line is illustrated diagrammatically at 2| and supporting ledges, or series of pillars, by the numeral 22. The iioor line, as illustrated, is approximately level with the top of the press bed; and such presses are constructed so that with a xed bed, in the form of press shown, and a xed lower die member which is illustrated diagrammatically in simple form and designated 25, the upper surface of this die 25 will be at such level that the operators may readily insert the sheets of material to be formed into the press, a considerable portion of the press thus extending down below the work floor into a suitable pit or other space below the floor. v

The bed is preferably a hollow casting, with suitable reinforcing ribs and peripheral flanges;

secured to the bedlinany suitable'way, as by means of bolts, orl boltedwedgemembers` as illustrated in said copending--application, and the bolster plate is provided with the-usual means for receiving vbolts to hold the lower diewrnem` ber in position, and maybeprovidedlwith the usual holes to receive `pins v,forv cooperating with the pressure cushions@ Cooperatingwith thebedand spacedA therefrom a suitable distance, which distance will depend upon the stroke of the movable dieslide,` is a rectangularl framework designated at 3-il lustrated diagrammatically as madeup oi=sepa rate members; with the side l andv end pieces" suitably bolted or otherwise rigidly connected tog-ether. Inter-posedV betweenv the rectangular ring or frame portion 3l)v and the bed are four tubular spacing orl side -members 35,y each ofV which is suitably connected at itslower end 'to the bed 2U and at its upperend is in engagement with the frame portion 30'.Y A pluralitywof` tierods or bolts 36is provided, eachrof which is threaded at each end. Eachof these-bolts ex*- tends through one of the spacermembers S5` and has its lower end extended through a passageinthe bed member which is coaxial with the corresponding spacer member l and has a nut 31 uponrthe lowerv endwhich can bevtightened properly against a lower portion of the bed. Likewise each upper yend of each bolt 36V passes through a passage in the crown portion 311.` which is in alignment with the passage in -a cooperating spacer member 35 andtheupper `threaded `end-A of each bolt is also provided with a nut 31. By properly adjusting thenuts 31 and 31'r the-bed and frame member, spaced betweenA members 35," mayr be` held in rigidconnected relation to `form a bed and upper frame `and side uprights` of the press structure or framework.

Also provided in each end of theA part 30, and midway between the pair of tie rods ateach-end;V is an enlargement carried by the `crown portion and designated 40, which has a` passageway therein receiving acylindrical sleeveldl' having a flange 42` at the bottom thereof which abuts` against thelower faceof enlargement lill.` This" sleeve 4l likewise has an inturned flangeV `1&3 at the upper end which receives `a hollow threaded sleeve 45,1having an external shoulder which: abutslagainst the inturned ange 43 and is held in position by means l'ofan adjusting ring 50,1 which is in driving connection with the sleeve 45, and `which rests against thev upper face of the framet30 and is held-inlocked position againstthis upperface by means of a nut 5l which is connected to-the upper end ofthe sleeve 45.` Threadedly mounted within the sleeve 45 is a threaded link member 55, the lower end of1 whichis enlarged. as shown atv 56 and: carries., a pivot or wrist pin 51 upon whichl is pivotally adjusted the crank orleccentricarm 58 *lof 'an eccentric strap 59. The eccentric.` strap` is mounted `upon the eccentric `|55, which in turn. is;` interconnected with a driving gear BE; both. the eccentricand its driving gear beingrotatable upon a crossshaft 61.`

The crossen-aft. 61 is'carried byaslide member,l 1l),` there being rtwo .l of these; veccentric and driving 3gear members 65.-65, each. supportedf byi` a shaft 61,` one of;` thesefshafts beingr; showmfat @nella elldmOt ther .Slide 1.0..; Thenconst'ructiorn off the eccentric, adjustable." linkmechanism and:`

the other'parts ioruth'elright-hand end of Fig. l aref'the same as parts described just above for the left-hand end, `as` viewed in Fig. 1.

The slide Amember1-also carries suitable support for a motor 15, which drives a` pulley and iiy wheel 15, mounted upon a shaft 1l@ and provided with'clutch and control mechanism so that the shaft 11 maylbe rotated from the power `source f or motor 15, or disconnected therefrom.

under suitable,N4 controls, the, mechanism illus-H tratedf 'and describediinf my referred tocopending application being satisfactory for this -pur` poseand" the driving mechanismlbeing' there fore show-n somewhat diagrammatically in the present application.,` In this driving n-iechanism,` as `in my referred'itocopending application, the

construction isf-such that by means of a series` of gears G8-68 thel poweris transmitted `from the shaft 11`` tothe eccentric gears 66, andlso to theeconnecting rods 58, by mea-ns which in\ cludes-the same number of gear contacts and which therefore have substantially the same number of points of mechanical friction orilost` motion, as a result of which the power is transmitted substantially equally to each of the ec` centrics so that theslide which'isactuated by` them will be caused to follow a substantially true rectilinear path of movement, and with nomaterial or objectionabletransverse or sidev thrusts.

The inner slide 1li is provided; with a pivot pin 80, located l about `midway of kits length, which pin extends through the upper side walls of theV inner `slide 10, and acts as a pivotal support for an outer slide 85, which is the die carrying slide in this instance, the upper die being diagrammatically` illustrated and designated at 881.

This outside slide 85, as shown is generally channel shaped in cross section, with its side walls braced byv end cross pieces 86, and it may` strap and connecting rod attachedl to it to raise andlower the inner slide f'l, with the entire driving power exerted at the opposite ends thereof through the shafts 61. This power is transmittedv from the inner slide 10 through the pivotal pinto the outside slide 85, this pin 80 being located substantially miclwaybetwe'en the ends of the outside die carrying slide 85. As pressure is exerted against the slidethis pressure will,` be exerted at substantially the-midpoint. Since, the bed, as shown, is supported at its opposite ends,. any deflection in the bed `would tend to reach., its maximum substantially midway of the ends offthebed. And by means ofthe construction of composite pivoted slide above set forth, the downward pressure exerted upon the die car-- rying slide 85 during operation will be substantially at the same midpoint and consequently any deections which occur may be readily compensatecl for. A composite die carrying member corn--A prising twol parts. pivotally interconnected may thus greatly reducelthe inherentldeflection or sag and may also automatically compensate forany such deflection and permit of using less massive parts,xwith economy in manufacture of the press, and` in replacement parts and also of securing more accurate and desirableY operating results. And .l very satisfactory operating results arev secured. by the:` embodiment of; the` invention shown in which the movable die carrying slide has the die carrying member pivotally connected to the* other associated slide member midway the ends thereof, and the operating power is applied to said associated member at its opposite ends and from it through the central pivot pin to the die carrying member. l

In order to prevent the pivoted slide 85 from' uncontrolled or excessive movement about the pivot pin 86, the inner slide is provided with two pins 90, one adjacent each end thereof, and these pins proj ect through openings in the outside slide each having enough clearance to permit the slight movements of the outer slide due to deections or deformations in operation, but with the clearance so limited, to a small fraction of an inch, as to correspond to the maximum permissible deflection of the cooperating die carrying member but sufficient `to permit the slight movement of the limit pins occasioned by deflection of the outer slide on opposite sides of the supporting pivot pin 89. In the construction here shown this clearance for these limit pins satisfactorily would be substantially less than the amount of maximum permissible'deection of the bed. Thus the outer slide cannot move materially away from the horizontal or the desired positioning with respect to the bed and, so it cannot bind in operation or take an undesirable positioning as a result of non-uniform distribution of forces within the die during the stamping or forming operation; but nevertheless it will automatically deflect and adjust itself adequately under operating pressures to compensate itself for the deflections of the cooperating die carrying member and the dies during a work operation. With the operating pressure on the pivoted slide exerted midway of its free ends,- andf thus at the zone of greatest deflection of the bed and in the direction of the bed deecting forces, this compensating action is automatically brought about and enforced by the press operation, in each instance.

This embodiment of press, as stated, is particularly adapted for forming sheets of metal into channel members such as are used as side frame members in an automobile, and it is therefore shown as narrow from front to back as compared with the distance between the supporting points for the bed or the distance between uprights.; And in such construction, the members 35 at each end are spaced apart a sufficient distance to permit of feeding or sliding a long and comparatively narrow sheet into the press through one end and so feeding them properly onto the lower die, and after the forming operation withdrawing the formed pieces through the corresponding opening between the members 35 at the other end of the press. This makes for considerably greater ease and effectiveness in handling of such sheets and parts formed therefrom. Also it permits of placing the press in line with other presses or machines operating on the sheets or parts formed therefrom, and thus makes for greater over-all manufacturing economy and efficiency. For purposes of comparison, an adequate understanding of the over-al1 dimensions of the press shown and of the parts thereof may be secured from reference to the statement above that the upper face of the lower die 25 is horizontally so positioned with respect to the work oor 2| that. the workman can readily feed the metal sheets into the press. From this it is evident that the gears, eccentrics and the like for transmitting the power are of very massive construction, as

8 illustrated, for example, in connection' with the eccentric gear 66 and the eccentric strap 59 and attached connecting rod 58, as shown in Fig. 2. Because of the thickness of these gears 66, and the eccentrics 65vand the straps 59 associated with them, in a comparatively narrow and long press, as illustrated, the power may be adequately applied along the central zone of the bed and slide, using only two of the eccentric strap and adjustable link mechanisms--a so-called twopoint power applying construction. In presses having widerbeds, so that the two-point construction might not give sufficiently rigid support for the die slide to withstand any tendencies of the slide` to cock and bind as a result of pressure applied away from the points of support shown, a four-point construction may readily-be utilized as shown in my copending application referred to. j

As shown, all of the operating mechanism is carried by the movable slide and below the upper end of the press mechanism, thus providing a more compact structure, with all the operating mechanism readily accessible and with greatly reduced hazard for workmen since the distance of the operating mechanism from the floor is greatly reduced and furthermore operators working upon this mechanism when it is within the press are protected against falling, against being accidentally knocked oi by traveling cranes and the like, by the top framework 30. And such construction also provides a highly satisfactory operating mechanism with lower head room so that the parts of the press may be readily handled by shop cranes.

The upper framework 30 is shown diagrammatically as built up of structural members bolted or otherwise rigidly connected together. For example, the four enlargements- .93 through which the tie rods or -bolts 36 pass may be separately formed, and provided with means whereby they may be bolted or otherwise properly secured to the two side members or connecting bars 9| and two short end pieces or bars Q2, each such bar being constructed to be bolted or fastened at each of the ends to said enlargements, Aby -bolts marked 9|. As shown in Figs. 1 and 3 an end of one of the longer cross bars is shown as bolted to one of the four enlargements 93. By means of this construction, the removal of the bolts 9| will permit of removal of the side and end pieces of the upper framework member 39 and this in turn will permit of removing the entire upper slide with its driving and pressure applying mechanism, as a unit. And this also permits of maintaining such a unit as a spare, so that if a unit in the press becomes inoperative it may lbe quickly removed and another put in its place without disassembling the whole press and the disabled unit repaired or provided with replacement parts in due course and without holding up the manufacturing operations of the press, or the whole line of presses and machines of which it forms a part. Such a unit may be removed and a new one installed in a few hours, and this makes for great manufacturing advantage and economy, since disabling of one essential press or machine in a line stops the whole line and therefore results in loss of time and of products far in excess of that which would be occasioned by mere stopping of a single press operating alone.

Because of the construction described in which the operating pressures are exerted in tension, with the adjustabley links having long bearing extent vand beingsuiiicientlymassive to prevent any objectionable deflection under the work pressures during the forming part of the press cycle, .the disturbing effect of any transverse forces which may be exerted at the wrist pins 51, due to small angular movement of the eccentric strap connecting rods 58, presents no problem and causes no objectionable results in operation. The construction is such that with the parts properly manufactured, the adjustment of the pressure .transmitting linkage at the respective ends of the `50 is provided on its outer face with inclined teeth adapted to mesh with a worm gear edge 96, gears for the adjusting nuts .being carried by an oper- `ating shaft 91 driven by driving gears 98 from a suitable adjusting motor 39 mounted on the crown, so that up and down adjustment of the threaded link 55 may bereadily accomplished to vary theldistance ofthe movable slide from the bed. These parts are shown diagrammatically as it is not thought necessary to illustrate this construction in detailas it may be substantially the same as the corresponding construction shown in my referred to copending applil cation, with such minor necessary structural modifications as to permit of mounting thsnut adjusting mechanism upon the slide.

.In the embodiment shown in Fig. .4' the composite pivoted die slide is shown included in a conventional type of stamping press. This press `comprises a bed member and a crown member 0|, with the uprights |02|02' interposed between them and 'firmly held together inthe usual manner by'` large tierods |03. In this construction the upright orside frame member |02 'is provided with asupporting bracket |04 carrying the fly wheel and clutch assembly designated generally by the numeral |05, and -which is driven, by `means `of `belts or the like, from a motor |06, mounted on an extending platform attached to the top of the crown. .The uprights |02-|02 have provisions `for receiving and supporting the crank shaft l0, which has a driven .gearwheel which is in meshing engagement with the gear (hidden behind the gear wheel l l) `by means of `which `power is transmitted from `the driving motor through the fly wheel and clutch assembly to the gear wheel and so to the crank shaft ||0. In the construction shown this crank shaft is provided Ywith two operating Acranks H2, and the crown isprovided with depending portions I3 in which the `crank shaft is rotatably supported.

Connected to each crank |l2isa.connecting rod ||5, the lower end of which is connected by means of a suitable wrist pinto an inner reciprocalble slide member |20. Surrounding this inner slide `is a`hollow.`outer slide 2| which is adapted to receive the upper die |32 and has `,guide faces |22 engaging with theguides |23 l-tolgive `properly directed reciprocating motion to Vthe composite slide `as the crank is revolved A. during operation.

The inner slide member |20 `is connected to fthe `outer slide member 2| by means of pivot pins |30, each of which, as shown, may'have its ends held in aligned openings in the sides of the inner and outer members |20-|2l, and `the `outer member is thus supported midway of its length by avpivotal connection between. the two members of the composite slide. Likewise,.as shown, the inner member |20 carries two limit pins |3 I, each of `which extends through openings in the walls of the outer member '|2l, which openings have small clearance for the pins. These openings also are suflciently large to perjmit ready deflection of the outer pivoted slide,

and the die parts carried thereby, to compensate for deflection or sag of the bed and bolster plate l and the lower die |33 and the upper movable slide and the parts carried thereby, in a manner heretofore described, and the clearance aroundthe limit pins is a small fraction of an inch-only sufficient to permit deformation of the pivoted slide member |2l, to meet deflection withinthe tolerances encountered in operation of the press,

`but this clearance is so small that any substantial pivoting of the slide as a whole, with consequent binding with other parts, or interference with the proper operation is prevented.

The connecting rods 5 are pivotallly connected to the innerslide member |20 adjacent its outer ends, and this connection may beby means of wrist pins mounted in an adjustable member, which may be properly actuated by motor drive to provide for lengthening or shortening the connecting rods and thusvarying the distance of the composite slide from the bed |00,

.as shown for example in patent, A. VA. Byerlein,

No. 1,817,885, August 4, 1931, and diagrammatically illustrated and designated by the numeral 135.

In the modiiied construction of press, of Figs.

`5,6, 7 and 8, the press is shown as comprising a bed member 200 which is provided with supporting standards or feet 20|, which are likewise diagrammatically shown as resting upon supporting masonry or other suitable support members, illustrated and designated 202.

The iloor line is indicated at 2F35, the press as illustrated therefore having substantially' half `of its extent above the Hoor line 205 and the other half below. The press is so located with respect to the door line that the lower die, when supported in the press, will be at such height that the workman may readily feed the sheets of ,metaL to be formed, into the press when standing upon the workfloor 205. As illustrated .the

4floor line is approximately level with the top of the bed vmember 200, and a pit is provided below the floor into which the lower half of the press extends.

This need not be an actual pit, as diagrammatically illustrated for purposes of simplicity, but it may bemerely a suitable space l provided in a lower part of the building beneath l the press workroom floor, in which `event suitable supporting columns, or supporting cross beams,

would be provided as support for the feet portions 20|.

The bed member 200 as shown is a hollow lcasting', having suitable internal and external y,strengthening flanges or ribs230.

`ber may be fastened thereto.

It is adapted to receive a bolster plate designated by the numeral 23|, this plate extending over` the open bed and being provided with suitable means, such as usual bolt receivers, whereby the lower die `mem- This .lower die is illustrated in very simple diagrammatic form in Fig. and designated by the numeral 232, the upper male die being correspondingly illustrated and designated by the numeral 233. The bolster plate is connected to the bed by means of suitable bolts or bolt-members as shown for example in my copending application referred to; and if desired air cushions may be utilized in the bed in the usual way also as shown for example in my said copending application.

The upper die 233 is suitably connected, as by means of bolts, not shown, to an upper movable die support member 246. This die support member 246 is illustrated as part of a composite or compound die slide, the part 246 being supported by means of a pivot pin 245, which is shown as located approximately midway of the length of the member 249, and which has its opposite ends mounted in an outer die slide member 256. This outer die slide member is hollow, being provided with braces or strengthening ribs and with peripheral strengthening flanges 25| As shown, more particularly in Fig. 1, the outer die slide member 256 is provided throughout its major extent between the sides, or upright members at the sides, of the press with parallel walls spaced apart sufficiently to receive between them the inner die carrying member 246.

At each end corner the outer slide member has hollow enlargements 255 formed thereon, each enlargement having a passage therethrough t0 receive the power transmitting linkage, and the top of each of these enlargements is substantially horizontal as shown to receive a plate member 266, which is bolted thereto, and travels with this outer slide member 256 during operation of the press. Bolted or otherwise suitably attached to each member 266 is a hollow housing member 26|, within which is mounted the upper end of a link 265 which in turn is firmly held in vertical position, as shown, by bearings or supporting collars or sleeves 266, which co-llar or sleeve 266 has a passage therethrough to receive the link in adjustable support.

The length of each link or rod 265 which extends up into this holding sleeve extension 26| is 'bending or deflection will occur during operation I of the press mechanism. The extension 26| has a passage 216 at its upper end which is in alignment with the passage in the member 266 and is covered over by an inverted cup shaped member 21|, adequate passage length for axial adjustment of each link to give proper variation in stroke of the upper die slide being thus permitted without adversely affecting the rigidity of the links in o-peration. 'I'he lower end of each link 265 is bifurcated to provide two extensions 215, which carry a supporting pin 216, which has pivotally mounted thereon the upper enlarged end 211 of a connecting rod 218, the lower end of which carries an eccentric strap 219, which receives a driving eccentric 286.

The eccentric 286 receives driving power during operation of the press from power applying mechanism to be hereinafter described, and the construction is such that as the several eccen trics 286 rotate the connecting rods 216 are correspondingly moved so that the pins 216 are moved a distance determined by the throw of the eccentric and this in turn transmits reciprocating motion to the links 265. And since these links are supported from the members 266 which are rigidly connected, as by means of strong bolts or the like, to the outer slide member 256, the driving power is transmitted equally to the opposite ends of this member 256. As shown, the power in turn is transmitted from the outer slide member 256 by means of the pivot pin 245 approximately midway of the inner die carrying pivoted slide member 246 so that up and down motion is imparted to the member 246 and the die member carried thereby. Thus, also, the members 246 and 256 are pivotally connected, with the oper,- ating power exerted against the outside ends of the member 256 and transmitted therefrom at substantially its mid-point through the pivot pin 245 to the inner slide member 266, and the operating power for the upper die carrying slide is exerted through this pivot pin 245 and is made effective half-way the length of the inner member 246.

The bed, along with the bolster plate and lower die member carried thereby, is supported at its outer ends and its effective length for deflection is the distance between its supports. Since the upper die carrying member 246 has the power applied substantially at its midpoint, the maximum downward pressure exerted upon this upper slide 246 and the die carried thereby, during operation of the press, will be substantially at the zone or line of greatest possible deflection of the bed and lower die. By means of such interconnection and interrelationship of parts, the pivoted upper slide member 246 will accommodate itself to the lower die, and the maximum pressure being exerted at the zone of greatest deiiection will more readily compensate for any deflection or sagging within the permissible range, as is true in the other modifications herein.

In order to maintain the upper pivoted slide member 246 in substantially the positioning desired and to prevent undue rocking about the pivo-t 245 with possible serious consequence in a large press exerting so much pressure upon the dies and the parts carrying them, the pivoted slide 240 and the outer slide 256 are shown as interconnected, adjacent their outer ends, by means of the two limit pins 285 and 285. These limit pins are rmly mounted in one of the slide members, and pass through aligned openings in the other slide member which have a slight clearance suilicient to permit the deformation or deection of the pivoted member 246 during operation, but still so limited to a small fraction of an inch as to prevent objectionable and undesirable pivoting of the slide 246 vabout its supporting pivot pin 245. As described above, the pins 285 and 285 may be suitably held in aligned openings in the outer slide 256 and pass through aligned openings in the inner slide 266 where the necessary clearance is provided, or they may be mounted in the inner slide member with the desired small amount of clearance provided in aligned openings in the outer slide member. In the press construction as here shown, the clearance for the limit pins 285 and 285 will be a small fraction of an inch as above set out.

Bolted to the bed member, at each corner thereof, is an upright or standard 296, each such standard being in cross section substantially as shown in Fig. '1, the bolts holding its lower end to the bed being indicated at 296'. Also bolted to the upper end of each corresponding pair of standards 296 is a cross bar frame member 29|, which is firmly bolted at each end to its cooperating standard 290 by bolts 292. Also, cross links 235 are in substantial alignment.

supporting bars 293, corresponding to parts `:25H

l*are provided which are bolted in between pairs of the standardsllhatlthe upper endsithereof. By means of this construction a `framework is provided which is rmly `supported from the bed member, and which has vthe upper ends ofthe standards 290 firmly `held together by means of the cross bars 29! and 293 so as thus to hold the upper ends of these standards interconnected `and to provide the firm framework referred to.

The pairs of members 293 are adapted to receive between them and to guide the ends of the outer slide 253; suitable pillow blocks or guide members 295 (Fig. '7) being provided for this purpose, which cooperate vwith corresponding parts of each of the four corners of the outer slide member 253. Also the platemembers 260 each `has attached thereto a rod 333, which is rod 278, and which serves to enclose its rod and protect it from dirt and injury. These members 305 may have bolt flanges 3h65 at the top by which each may `be bolted in place against the bottom of the cross bars 23|, the lower ends setting in `depressions 33t formed inthe top oi .the bed.

In the construction described, as in the construction described in my referred to copending applica-tion, the forces areexerted in tension during the work performing part of the cycle of the press. In other words, with the parts as shown in the drawing, the upper composite die carrying slide, which is shown asa movable one, is` in its uppermost position, lthe eccentrics lbeingso positioned that the connectingrod 278 and the The work having been introduced with the press partsin `this position, operationof the driving means to rotate the eccentrics 28D, willcause downward movement of the upper ends of the connecting rods andthe pins 216 and as theseparts are carefully manufactured and adjusted the force exerted downwardly` uponthe movable composite slide Zlib-25d, will be substantially uniformly 'Y exerted at each corner and this movable die carrying member and its diewilltendto receive straight linear motion. And through'completion of the forming or stamping operation this-rea tilinear movement is maintained, subject only to such slight tendency toward transverse forces exerted at the pins 233 as results from thecomparatively slight rocking motion of theconnecting rods aboutsuch pins dueto` the rotation of the eccentrics. Butas is evident, the connecting rods 278 are quite long compared to the travel `of the bed and the length of the links 235, and

the axes ofthe power transmitting` pins `2l@ are positioned considerably above the lower, face of the die carrying slide, `and consequently ,such

comparatively slight rocking motion;` of the` connesting rods will have no material or objection- .able effect. But the downward pull effective `compensated for. `And `in any event 1thelinks `265 areisofconsiderable size, as is cobvious, being at times as muchas .110. or 12inches in diameter, or whatever diameter maybe required to give 4suncient nrigidity to withstand the operating forces `Thus the standards 29D, with the inter- `connectingfcross pieces v29| and 292 provide a -frame Vwork however which is of adequate `strength to absorb any transverse force exerted atthese pivot-pins `216, whether upon Vup or .down l motionof the movable slide.

The transmission of power to the eccentrics -283 is accomplished by. means of `suitable power `driven gefaritrains sdarranged that the same ynumberof:power transmitting members are posi- :tioned betweenflthe driving motor 3|5 and each leccentrica-.so that mechanical losses and play and other'forces willbe equally divided to ,give substantially uniform driving force effective `at each 'of the four corners.

As illustrated the motor 3| 5 .is-provided with a'driving pulley 3|5 whichcar- `ries-a plurality of drive `belts 3|1, which engage Aa `larger .pulley 3|8mounted upon a shaft 3|9, which is supported at each side of the press, from a depending bracket 320, to provide a cross shaft `which iszproperly supported at, each end.

The pulley 3| 8is connected to a flywheel 325;

z and the `pulley and iiywheel assembly are adapted 'to rotatecontinnously upon the shaft 3|9, dur- .ing operation of the drive motor, and suitable clutchvand control mechanism therefor is pro- `vided so that when suitably actuated the clutch will engage theiiywheel, to cause rotation of the shaft 3|9 atzthe same time releasing a brake, substantially inthe manner described inmy above .referred to .copending application, The shaft 3|9:carries a gear 330 at eachend, each of which i gears` meshes with a pair of gears 33| and 332- the gear 33|, as shown in Fig. 5, Vbeing adapted 2 to transmit power to the right hand corner eccen- 40 tric and the gear 332 to transmit power to the left hand corner eccentric. The gear 33| meshes with a 'cooperating gear 333, carried upona shaft @334,which shaft carries a pulley 335 thereon,

Athat'pulleyl` being connected by means of suitable belts to another pulley 336 mounted upon a shaft `33`| which shaft carries a gear 333 at each end f thereof, each of these gears being adapted to jmeshfwith one of the large eccentric drive gears 339,leach mounted upon a shaft 34|). Each shaft `340 carries an eccentric 280, and through the members of the power transmitting train described,power is transmitted from the motor 3|5 :to the-eccentric `28|).

Power is likewise transmitted equally through gears 345, 34B, pulley 341, pulley 348, gear 349 to the large eccentric gear 339 at the leftcorner of Fig. 5 so that there is `an equal transmission of power with equal me- I chanical friction and lost motion to the eccentric l gear 339. There are two eccentrics for the other or backside of the press which are likewise driven rrside of the press the same as described above. Thus a four point drive, that is a drive for each j corner of the `slide issecured, withsubstantially iuniiorm transmission of power by the diverging gear trains to `give the rectilinear motion of the slide as described. y

While the forms of apparatus herein described constitute.preferred embodiments of the invention, it is to Vbeunderstood that the invention is `not limited to these` precise forms of apparatus,

departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In a stamping and drawing press of the character described, a bed having provisions for receiving a die, a movable composite slide member for supporting a cooperating die, lsaid composite member comprising a hollow part and a second part movably positioned therein, means for connecting said outer hollow part to the press power transmitting mechanism whereby operating movement is imparted to said part, means for pivotally interconnecting said parts to transmit the operating power from said outer part to the inner part, said inner part having provisions for receiving the die, said pivotal connection having the axis thereof substantially transverse of the direction of reciprocation of said composite member and being located to transmit power to said inner pivoted part at the zone of maximum deection of said bed during the forming operation to automatically cause compensation for deection of said bed under the work pressures in the forming operation.

2. In a stamping and drawing press of the character described, a bed having provisions for receiving a die and supported adjacent its ends with an intermediate Zone thereof subject to maximum deflection under operating pressures, a movable composite slide member for receiving a cooperating die, said composite member comprising a hollow part and a second part movably positioned therein, means for connecting one of said parts to the press power transmitting mechanism whereby operating movement is imparted to said part, means for pivotally interconnecting said parts to transmit the operating pressure from said one part to the other, said other part having provisions for receiving the cooperating die, and means for guiding said die receiving part during operating movement thereof to maintain the same in proper alignment with said bed, said pivotal connection between said parts having the axis thereof substantially transverse of the direction of reciprocation of said composite member and being located to transmit power to said other pivoted part at said zone of maximum deflection of said bed during the forming operation to automatically cause compensation in deflection of said bed under the work pressures in the forming operation.

3. In a stamping and drawing press of the character described, a bed member supported adjacent its ends with an intermediate zone thereof subject to maximum deflection under operating pressures and having provisions for carrying a die, a movable composite slide member, said composite member comprising a hollow part and a second part movably positioned therein, means for connecting one of said parts to the press power transmitting mechanism whereby operating movement is imparted to said part, means for pivotally interconnecting said parts to transmit the operating power from said one part to the other part, means carried by the other part for receiving a die member for cooperation with the die carried by said bed to effect a forming operation, said pivotal connection between said pivoted' parts having the axis thereof substantially transverse of the direction of reciprocation of said composite member and being located substantially midway between the ends of said other pivoted part to transmit power to said other pivoted part at said zone of maximum deflection of said bed and in the direction of deflection during the forming operation to automatically cause compensation for deflection of said bed under the work pressure in the forming operation.

4. In a stamping and drawing press of the character described, a bed member supported adjacent its ends with an intermediate zone thereof subject to maximum deflection under working pressures, frame means supported above said bed, adjustable links carried by said frame m-eans, a composite slide member within said frame, said composite member comprising a hollow part and a second part movably positioned therein, power transmitting mechanism carried by the composite slide member, connecting rods connecting one of said parts to said links, means operably connecting said connecting rods and said power transmitting mechanism to cause reciprocation of said composite slide member in working operation of the press, means for pivotally interconnecting said parts to transmit the operating pressure from said one part to the other part, said other part having provisions for receiving a die, said pivotal connection between said parts having the axis thereof substantially transverse of the direction of reciprocation of said composite member and being located to transmit power to said other pivoted part at said zone of maximum deection of said bed during the forming operation to automatically cause compensation in deection of said bed under the work pressures in the forming operation.

5. In a stamping and drawing press of the character described, a bed member supported adjacent its ends with an intermediate Zone thereof subject to maximum deflection under operating pressures, frame means supported above said bed, adjustable links carried by said frame means, a composite slide member within said frame means, said composite member comprising a hollow part and a second part movably positioned therein, power transmitting mechanism carried by the composite slide member, connecting rods connecting one of said parts to said links, means operably connecting said connecting rods and said power transmitting mechanism to cause reciprocation of said composite slide member in working operation of the press, means removable from the frame means whereby said composite slide member and driving mechanism may be removed from or introduced into the press as a unit while maintaining the assembly of the rest of the press parts, means for pivotally interconnecting said parts to transmit the operating pressure from said one part to the other part, said other part having provisions for receiving a die, said pivotal connection between said parts having the axis thereof substantially transverse of the direction, of reciprocation of said composite member and being located to transmit power to said other pivoted part at said zone of maximum deiiection of said bed during the forming operation to automatically cause compensation in deflection of said bed under the work pressures in the forming operation.

6. In a stamping and drawing press of the character described, a bed member supported adjacent its ends with an intermediate zone thereof subject to maximum deflection under operating pressures, frame means supported above said bed, adjustable links carried by said frame means, a composite slide member within said frame means, said composite member comprising a hollow part and a second part movably positioned therein,

Apower transmitting mechanism carried by the composite slide member, connecting rods connect- 17 ing one of said parts to said links, means operably connecting said connecting rods and said power transmitting mechanism to cause reciprocation of said composite slide member in working operation of the press, means for pivotally interconnecting said parts to transmit the operating pressure from said one part to the other part, said other part having provisions for receiving a die, said pivotal connection between said parts having the aXis thereof substantially transverse of the direction of reciprocation oi said composite member and being located to transmit power to said other pivoted part at said zone of maximum deflection or said bed during the forming operations to automatically cause compensation in deflection of said bed under the work pressures in the forming operation, and limit pins permitting said deflection `compensation while maintaining said pivoted part against objectionable movement about said pivotal connection.

7. A stamping press of the character described comprising a bed supported adjacent its ends and having provisions for supporting a die, a crown member, spaced uprights between said bed and -21 crown, means for holding the bed and crown and uprights tightly together, a crank shaft supported in the upper part of said press, power means for operating said crank shaft, a movable composite slide, connecting rods supporting said slide from said crank and for causing reciprocation of said slide in said press, said composite slide comprising an inner part operatively connected to said connecting rods and an outer hollow part having guide means, cooperating guide `means on said uprights, said outer part of ysaid composite slide having provisions for receiving an upper die, and a pivotal connection between said parts of the composite slide located substantially midway between ythe ends thereof for transmitting `operating pressures from the inner to the outer part during forming operation Vat the YZone of maximum deectionci said bed during the forming operation and in the direction of deflection of the bed to automatically cause compensation for deflection of said bed during said forming operation.

8. A stamping press of the character de scribed `comprising a bed supported adjacent its ends and having `provisions for supporting a die, a crown member, spa-ced uprights between said bed `and crown, means for holding the bed and crown and uprights tightly together, a crank shaft supported in the upper part of said press, power means for operating said crank shaft, a movable composite slide, connecting rods supporting said slide 4from said crank `and for causing reciprocation lof said slide in said press, said composite slide comprising an inner part operatively connected to said connecting rods and an outer hollow part having guide means, cooperating guide means on said uprights, said outer part of said composite slide having `provisions for receiving an upper die, a pivotal connection between said parts of the composite slide located substantially midway between the ends thereof for transmitting `operating pressures. from the inner to the outer part during forming operation at `the zone of `maximum delection of said bed during the forming operation and in `the direction of deflection of the bed to automatically cause compensation for deflection of said bed during said forming opera-- tion, .and limit `pins permitting said "deflect-ion compensation while maintaining 'said pivcted 18 part against objectionable movement about said pivotal connection.

9. In a press of the character described, a bed for receiving a die, means for supporting said bed adjacent the ends thereof with the deflection thereof under working pressures reaching a maximum at a zone intermediate said ends, a reciprocable slide comprising pair of relatively movable slide members arranged one within the other, one ci said members being adapted to receive a cooperating die, drive means for effecting reciprocating movement of said slide, pivot means connecting said slide members and having its axis arranged transversely thereof in the plane substantially parallel with said bed ends and passing through said zone of maximum deflection of said bed, and means forming a `driving connection from said drive means to the other of said slide members to transmit working pressures to said die carrying slide member in said plane through said pivot means and to compensate for dei'lecticn of said bed and the die carried thereby under said working pressures by complementary deflection of said .die carrying slide member.

l0. In a press of the character described, a bed supported adjacent its ends and adapted to receive a die with the denection thereof reaching a maximum intermediate said ends, a reciprocable slide including a pair of separate ,slide members, one of said members being adapted to receive la cooperating die, drive means for .effecting reciprocating movement of said slide, means cperably connecting the other `of .said slide members with said drive means, pivot means connecting said slide members to form the driving connection from said other slide member to said die carrying slide member, said pivot means having its axis located transversely of said slide member in the plane of said maximum deection to `compensate for said .deflection of said bed and the die carried `thereby under working pressures by complementary .deflection of said die carrying slide member and said cooperating die, and means adjacent the periphery `oi said die carrying slide member for guiding the `same in proper alignment with said bed during the :working `stroke `of said slide.

ll. In a press of the character described, a bed supported adjacent its ends with the intermediate portion thereof subject to deflection under working pressures and adapted to receive a die, a composite slide member for carrying a cooperating die, drive means `for effecting reciprocating movement or" said slide member, said slide member including a part having a `driving connection with said drive means and a second part adapted to receive said `(',ooperating die, and `pivot means connecting said vtwo parts :and having its axis extending `transversely of said slide in a plane substantially parallel with and intermedia-te said `bed ends to transmit `,working pressures to said die carrying part and bed during work operations along said pivotal axis and to compensate for deflection of said bed and the die carried thereby under `said working pressures by complementary deflection or vsaid die carrying slide part and the die carried thereby.

l2. In a press ofthe character described, a bed supported adjacent its ends with the intermediate portion thereof subject to deflection under working pressures and adapted to receive a die, a composito slide member for carrying a cooperating die, drive means for `effecting re- 'ciprocating movement of said slide member, said slide member comprising two relatively movable parts, one of said parts being adapted to receive said cooperating die, means adjacent opposite ends of the other of said parts forming driving connections with said drive means, and pivot means forming a driving connection from said other part to said die carrying part, said pivot means extending transversely of said slide member and substantially parallel with said bed ends and midway between said driving connection means to compensate for deflection of said bed and the die carried thereby under working pressures by complementary deflection of said die carrying slide part and said cooperating die.

13. In a press of the character described, a bed supported adjacent its ends with the intermediate portion thereof subject to deflection under working pressures and adapted to receive a die, a composite slide member for carrying a cooperating die, drive means for effecting reciprocating movement of said slide member, said slide member including a part having a driving connection with said drive means and a second part adapted to receive said cooperating die, pivot means connecting said two parts and having its axis extending transversely of said slide in a plane substantially parallel with and intermediate said bed ends to transmit working pressures to said die carrying part and bed during work operations along said pivotal axis and to compensate for deflection of said bed and the die kcarried thereby under said working pressures by complementary deflection of said die carrying slide part and said cooperating die, and limit pins carried by said composite slide member for permitting said deflection compensation while maintaining said die carrying part against objectionable movement about said pivotal connection.

14. In a press of the character described, a bed member supported adjacent its ends with the intermediate portion thereof subject to deliection under working pressures and adapted to receive a die, frame means supported from said bed, a composite slide supported by said frame means, power transmitting mechanism comprising a motor and power transmitting means carried by said bed, link means having one end adjustably connected to said composite slide, means for transmitting power from said mechanism to .the other end of said link means to elfect rectilinear reciprocating motion of said composite slide, said composite slide comprising an outer part and an inner part movably positioned therein and having means for receiving a die, means for pivotally connecting said parts substantially midway of the ends of said inner part to transmit forming pressure therebetween, said link means being operably connected to said outer part of said composite slide and transmitting power thereto for work movement, said pivotal connection being located to transmit forming pressure between the dies in the Zone of maximum deflection of said bed and in the direction of said deflection to effect automatic compensation for relative deflection in the bed and composite slide member and the dies carried thereby.

15. In a press of the character described, a bed member supported adjacent its ends with the intermediate portion thereof subject to deflection under working pressures and adapted to receive a die, frame means supported from said bed, a composite slide supported by said frame means, power transmitting mechanism comprising a motor and power transmitting means carried by 20 said bed, link means having one end adjustably connected to said composite slide, means for transmitting power from said mechanism to the other end of said link means to effect rectilinear reciprocating motion of said composite slide, said composite slide comprising an outer part and an inner part movably positioned therein and having means for receiving a die, means for pivotally connecting said parts substantially midway of the ends of said inner part to transmit forming pressure therebetween, said link means being operably connected to said outer part of said composite slide and transmitting power thereto for work movement, said pivotal connection being located to transmit forming pressure between the dies in the zone of maximum deection of said bed and in the direction of said deflection to effect automatic compensation for relative deflection in the bed and composite slide member and the dies carried thereby, and limit pins permitting said deflection compensation while maintaining said pivoted inner part against objectionable movement about said pivotal connection.

16. In a stamping and drawing press of the character described, a movable composite slide for supporting a die member, stationary means for supporting a cooperating die member, means mounting said stationary die supporting means adjacent opposite ends thereof with the intermediate portion thereof subject to deflection under operating pressures applied thereto by said slide, power transmitting means for causing reciprocation of said slide to effect a working operation of said die members under forming pressure in a working cycle of said press, said composite slide comprising a first part operatively connected to said power transmitting means and a second part adapted to carry said die member, pivotal means located substantially centrally of said second part for pivotally connecting said second part to said first part and constructed to transmit driving power to said second part for effecting forming pressure of said die members, said pivot means having the axis thereof substantially transverse of the direction of reciprocation of said slide, said pivotal connection being substantially opposed to said unsupported intermediate portion of said stationary die supporting means to effect automatic compensation for variations in deflection of said stationary die supporting means and the die carried thereby by complementary deflection of said die carrying slide part.

1'7. In a stamping and drawing press of the character described, a composite die carrying slide, a die carrying member, a drive for effecting cooperating relative movement of said slide and said member to effect forming pressure of the dies supported thereby, means supporting said die carrying member with a predetermined Zone thereof subject to maximum deflection under said forming pressure, said composite slide including a rst part operatively connected to said drive and a second part adapted to carry the die, a pivotal connection between said parts for transmitting working pressure from said first part to said die carrying part, and means for guiding said die carrying part to maintain the same in proper alignment with said die supporting member, said pivotal connection being located substantially opposite said zone of maximum deflection of said die carrying member to effect automatic compensation for deflections occurring in said die carrying member during a, forming operation,

18. n a stamping and drawing press of the character described, a composite die carrying slide, a die carrying member, a drive for effecting cooperative relative movement of said slide and member to eff-ect forming pressure of the dies carried thereby, means supporting said die carrying member with a predetermined zone thereof subject to maximum deflection under said forming pressure, said composite slide including two parts with one of said parts movably positioned inside the other, means operatively connecting one of said parts to said drive, the other said part being adapted to carry the die, and means forming a pivotal connection between said parts for transmitting working pressure to said die carrying part from the other of said parts and with the axis of said connection substantially trans# verse ofthe direction of relative movement of said slide and member, said pivotal connection being located substantially opposite said zone of maximum deflection of said die carrying member to compensate for deflections occurring therein during said forming operations by effecting automatic complementary deflection of said die carrying slide part.

19. In a press of the character described, a bed adapted to receive a die, means for supporting said bed adjacent its ends with an intermediate portion of said bed subject to deecton under working pressures, a reciprocable slide comprising a pair of slide members, one of said members being adapted to carry a cooperating die, pivot means forming a connection between said slide members with the axis thereof extending transversely of said slide in opposed relation to said intermediate portion of said bed, drive means for effecting reciprocating movement of said slide, means forming a driving connection from said drive means to said other slide member to apply Working pressure to said die carrying slide member through said pivot means in the plane passing through said pivot axis and intermediate said bed ends to compensate for deection of said bed and the die carried thereby under said Working pressures by complementary deection of said die carrying slide member and said cooperating die, and means cooperating with said slide to maintain said die carrying slide member in proper alignment with said bed throughout the working stroke of said slide.

ARTHUR A. BYERLEIN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 626,574 Sotter June 6, 1899 1,817,885 Byerlein Aug. 4, 1931 2,120,356 Glasner June 14, 1938 2,133,161 Colbert Oct. 1l, 1938 2,169,113 Sheppard Aug. 8, 1939 2,378,062 Byerlein June 12, 1945 2,394,941 Smith Feb. 12, 1946 FOREIGN PATENTS Number Country Date 3,531 Great Britain of 1903 431,457 Great Britain of 1935 686,942 France of 1930 680,936 Germany of 1939 

